HIFROM(TM Replace CARBURETOR for Tecumseh 632107 632107A 640084 640084A 640084B TORO 521 Small Engine Mower Generator 1. New high quality aftermaket replacement Carburetor w/ GASKET 2. Fits many 4 & 5 HP 4 cycle engines. 3. Replaces 632107, 632107A, 640084, 640084A, 640084B 4. Fits Models: HSK40, HSK50, HSSK40, HSSK50, HS50, and LH195SA 5. HIFROM carburetor from Professional Factory; Professional technical support; if you unsatisfy, can return to our USA warehouse, no risk